Joseph Gordon-Levitt, who gets painfully dumped in “(500) Days of Summer,” has landed on his feet in real-life love. The actor is dating stunning model and actress Devon Aoki. They were spotted smooching at the Bing party at Boa Steakhouse in LA Tuesday night. A spy said, “They were holding hands, kissing and telling everyone they were a couple.” The American-Japanese beauty and Benihana heir has previously dated Lenny Kravitz.